linux-kernel - Re: [PATCH v2 1/2] memory: fsl_ifc: Make FSL

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Date: Tue, 28 May 2024 13:15:51 +0000
From: Christophe Leroy <christophe.leroy@...roup.eu>
To: Esben Haabendal <esben@...nix.com>, Krzysztof Kozlowski <krzk@...nel.org>,
	Tudor Ambarus <tudor.ambarus@...aro.org>, Pratyush Yadav
	<pratyush@...nel.org>, Michael Walle <mwalle@...nel.org>, Miquel Raynal
	<miquel.raynal@...tlin.com>, Richard Weinberger <richard@....at>, Vignesh
 Raghavendra <vigneshr@...com>, Michael Ellerman <mpe@...erman.id.au>,
	Nicholas Piggin <npiggin@...il.com>, Aneesh Kumar K.V
	<aneesh.kumar@...nel.org>, "Naveen N. Rao" <naveen.n.rao@...ux.ibm.com>
CC: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>,
	"linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>
Subject: Re: [PATCH v2 1/2] memory: fsl_ifc: Make FSL_IFC config visible and
 selectable



Le 28/05/2024 à 14:28, Esben Haabendal a écrit :
> [Vous ne recevez pas souvent de courriers de esben@...nix.com. Découvrez pourquoi ceci est important à https://aka.ms/LearnAboutSenderIdentification ]
> 
> While use of fsl_ifc driver with NAND flash is fine, as the fsl_ifc_nand
> driver selects FSL_IFC automatically, we need the CONFIG_FSL_IFC option to
> be selectable for platforms using fsl_ifc with NOR flash.

I don't understand.

Shall I understand :

While use of fsl_ifc driver with NAND flash is fine as the fsl_ifc_nand 
driver selects FSL_IFC automatically, ....

or

..., as the fsl_ifc_nand driver selects FSL_IFC automatically we need 
the CONFIG_FSL_IFC option to be selectable for platforms using fsl_ifc 
with NOR flash



I'm fine with the fact that you want to be able to select it when you 
use NOR flashes, allthough I can't see why, but why do you need to 
change the "select" to a "depend" ? You should be able to leave it as a 
"select" in which case patch 2 wouldn't be necessary.

Christophe



> 
> Fixes: ea0c0ad6b6eb ("memory: Enable compile testing for most of the drivers")
> Signed-off-by: Esben Haabendal <esben@...nix.com>
> ---
>   drivers/memory/Kconfig       | 2 +-
>   drivers/mtd/nand/raw/Kconfig | 3 +--
>   2 files changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/memory/Kconfig b/drivers/memory/Kconfig
> index 8efdd1f97139..c82d8d8a16ea 100644
> --- a/drivers/memory/Kconfig
> +++ b/drivers/memory/Kconfig
> @@ -167,7 +167,7 @@ config FSL_CORENET_CF
>            represents a coherency violation.
> 
>   config FSL_IFC
> -       bool "Freescale IFC driver" if COMPILE_TEST
> +       bool "Freescale IFC driver"
>          depends on FSL_SOC || ARCH_LAYERSCAPE || SOC_LS1021A || COMPILE_TEST
>          depends on HAS_IOMEM
> 
> diff --git a/drivers/mtd/nand/raw/Kconfig b/drivers/mtd/nand/raw/Kconfig
> index cbf8ae85e1ae..614257308516 100644
> --- a/drivers/mtd/nand/raw/Kconfig
> +++ b/drivers/mtd/nand/raw/Kconfig
> @@ -234,8 +234,7 @@ config MTD_NAND_FSL_IFC
>          tristate "Freescale IFC NAND controller"
>          depends on FSL_SOC || ARCH_LAYERSCAPE || SOC_LS1021A || COMPILE_TEST
>          depends on HAS_IOMEM
> -       select FSL_IFC
> -       select MEMORY
> +       depends on FSL_IFC
>          help
>            Various Freescale chips e.g P1010, include a NAND Flash machine
>            with built-in hardware ECC capabilities.
> 
> --
> 2.45.1
>